Re: Very low disk performance Highpoint 1820a
From: Marcus Grando (marcus_at_corp.grupos.com.br)
Date: 04/29/05
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Date: Fri, 29 Apr 2005 09:46:49 -0300 To: freebsd-current@freebsd.org
You try with iozone (benchmarks/iozone)?
Regards
Steven Hartland wrote:
> I've just finished putting together a new server box spec:
> Dual AMD 244, 2GB ram, 5 * Seagate SATA 400GB on a
> Highpoint 1820a RAID 5 array.
> The machine is currently running 5.4-STABLE ( from the
> weekend ) After install I did some basic tests and the
> disk is return very poor performance low in fact than a
> single disk on a bog standard ATA 100 controller:
>
> 5.4-STABLE Highpoint 1820a RAID 5 ( 5 disk )
> dd if=/dev/da0 of=/dev/null bs=64k count=10000
> 10000+0 records in
> 10000+0 records out
> 655360000 bytes transferred in 13.348032 secs (49097875 bytes/sec)
>
> 5.3-RELEASE Highpoint 454 RAID 5 ( 4 disk )
> dd if=/dev/da0 of=/dev/null bs=64k count=10000
> 10000+0 records in
> 10000+0 records out
> 655360000 bytes transferred in 20.410034 secs (32109697 bytes/sec)
>
> 5.2.1-RELEASE Intel ICH3 UDMA100 ( 1 disk )
> dd if=/dev/ad0 of=/dev/null bs=64k count=10000
> 10000+0 records in
> 10000+0 records out
> 655360000 bytes transferred in 11.142405 secs (58816745 bytes/sec)
>
> Obviously something is seriously a miss here somewhere as
> both the RAID 5 arrays a producing less throughput than
> a single disk.
>
> Where do I start looking?
>
> Steve
-- Marcus Grando Grupos Internet S/A marcus(at)corp.grupos.com.br _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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